One surprising addition for a cheap phone is the ability to support motion data collection, meaning your phone will track and record your movement and location. (techradar.com)
This added chip will be dedicated to continuously monitoring incoming motion data from the phone's accelerometer, gyrosope and compass. (theverge.com)
Three - axis accelerometer Vibration motor OLED tap display Saves seven days of motion data Saves daily totals for 30 days Elastomer band comes in small, large and extra large (tomsguide.com)